Measurement and thermodynamic model study on equilibrium solubility in the aqueous system of magnesium chloride and magnesium bromide

被引：11

作者：

Meng, Lingzong ^{[1
,2
]}

Li, Dan ^{[1
]}

Deng, Tianlong ^{[2
]}

Guo, Yafei ^{[2
]}

Ma, Yong ^{[1
]}

机构：

[1] Linyi Univ, Coll Chem & Chem Engn, Linyi 276005, Peoples R China

[2] Tianjin Univ Sci & Technol, Tianjin Key Lab Marine Resources & Chem, Tianjin 300457, Peoples R China

来源：

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 2013年 / 43卷

关键词：

Solubility measurements; Pitzer model and Harvie-Weare solubility approach; Magnesium bromide; Solid solution; Thermodynamic (solid plus liquid) equilibria model; SOLID-LIQUID EQUILIBRIA; MINERAL SOLUBILITIES; NATURAL-WATERS; SOLUTION BEHAVIOR; PREDICTION; TEMPERATURE; LITHIUM; SALTS;

D O I：

10.1016/j.calphad.2013.04.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Solubilities of the ternary system MgCl2-MgBr2-H2O at T=(288.15, 308.15, 323.15 and 333.15) K were investigated, and the crystallization behaviour of solid solution Mg(Cl,Br)(2) center dot 6H(2)O was established. Combining our experimental results with other experimental data available in the literature at T=(298.15 and 313.15) K, the pure electrolyte solution parameters for binary systems, the T-variation mixing parameters theta(Cl,Br) and psi(Mg,Cl,Br) and the equilibrium constants equations of the solid solution were obtained. Based on Pitzer model and Harvie-Weare solubility approach, the solubility modelling approach achieved a very good agreement with chloride and bromide salts equilibrium solubility data. Temperature-dependent equation in the system provides reasonable mineral solubility at T=(288.15-333.15) K. This model expands the solubility calculation in the systems containing solid solution by evaluating chloride-bromide mixing solution parameters. Limitations of the mixed solution models due to data insufficiencies are discussed. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：105 / 111

页数：7

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